Description
A by-election for the United Kingdom parliamentary constituency of Runcorn and Helsby was held on 1 May 2025, the same day as local elections in England. Following a recount, Sarah Pochin of Reform UK won the by-election with a majority of six votes, overturning a Labour majority of 14,696 votes in the last general election. It was the closest British post-war by-election result, and the closest result in a constituency since North East Fife in the 2017 general election.